/*
 * Copyright (c) 2020, 2020, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 */
package com.oracle.svm.core.thread;

import org.graalvm.nativeimage.IsolateThread;

import com.oracle.svm.core.Uninterruptible;

public interface ThreadListener {
    @Uninterruptible(reason = "Only uninterruptible code may be executed before the thread is fully started.")
    @SuppressWarnings("unused")
    default void beforeThreadStart(IsolateThread isolateThread, Thread javaThread) {
    }

    default void beforeThreadRun() {
    }

    /**
     * Implementations must not throw any exceptions. Note that this method is called on listeners
     * in the reverse order of {@link #beforeThreadRun}.
     */
    @Uninterruptible(reason = "Only uninterruptible because we need to prevent stack overflow errors. Implementations may execute interruptible code.")
    default void afterThreadRun() {
    }

    /**
     * Implementations must not throw any exceptions. Note that this method is called on listeners
     * in the reverse order of {@link #beforeThreadStart}.
     */
    @Uninterruptible(reason = "Only uninterruptible code may be executed after Thread.exit.")
    @SuppressWarnings("unused")
    default void afterThreadExit(IsolateThread isolateThread, Thread javaThread) {
    }
}
